Electrowetting-Based Variable-Focus Lens for Miniature Systems |
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Authors: | B. H. W. Hendriks S. Kuiper M. A. J. VAN As C. A. Renders T. W. Tukker |
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Affiliation: | (1) Philips Research Laboratories, Prof. Holstlaan 4, Eindhoven, 5656 AA, The Netherlands |
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Abstract: | The meniscus between two immiscible liquids of different refractive indices can be used as a lens. A change in curvature of this meniscus by electrostatic control of the solid/liquid interfacial tension leads to a change in focal distance. It is demonstrated that two liquids in a tube form a self-centred variable-focus lens. The optical properties of this lens were investigated experimentally. We designed and constructed a miniature camera module based on this variable lens suitable for mobile applications. Furthermore, the liquid lens was applied in a Blu-ray Disc optical recording system to enable dual layer disc reading/writing. |
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Keywords: | liquid lens electro wetting camera optical recording |
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